Abstract
A morphometric analysis is made of the relief for the mountainous territory in Western Cisbaikalia: the Primorskii Range, the landscapes of which have been transformed for a long time under the influence of the pyrogenic factor. Under such conditions, it becomes relevant to determine the relationships between the geomorphological conditions of the territory and the distribution of postpyrogenic landscapes, as well as the possibility of using the results in landscape mapping. The basis for maps of surface curvature is provided by a digital elevation model based on ALOS radiometer data with a resolution of 30 m. Using geoinformation analysis, maps of the steepness and exposure of slopes and horizontal and vertical curvature are obtained and the statistical coefficients of these indicators for the study area are determined. To determine the degree of influence of geomorphological conditions on the distribution of postpyrogenic landscapes, a geomorphological map is compiled, a typification of the relief is carried out according to the altitudinal layers, and a correlation with corresponding types of locations is determined. At this stage of research, the following connections are revealed between the geomorphological heterogeneity of the local relief and the nature of the spread of fire: in some cases, river valleys become barriers to the spread of fire (their summits are usually not affected by fire). Another option for barriers are the ridges located across slopes; thus, the orientation of orographic relief elements can be designated as a limiting factor in the spread of fires. The prevailing southeastward exposure of the macroslope of the Primorskii Range, which coincided with the northwestward direction of the main air transport, becomes an intensifying factor in the spread.
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Funding
This study was funded by State Tasks of the Sochava Institute of Geography, Siberian Branch, Russian Academy of Sciences AAAA-A21-121012190059-5, AAAA-A21-121012190063-2, and AAAA-A21-121012190017-5.
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Opekunova, M.Y., Bilichenko, I.N., Bardash, A.V. et al. Influence of the Relief on the Pyrogenic Disturbance of Geosystems of the Primorskii Range (Western Cisbaikalia). Geogr. Nat. Resour. 44, 150–157 (2023). https://doi.org/10.1134/S1875372823020105
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DOI: https://doi.org/10.1134/S1875372823020105